Magnetic fields in dense interstellar clouds

Details Magnetic fields in dense interstellar clouds Magnetic fields in dense interstellar clouds

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981rspta.303..581d&link_type=abstract

(Royal Society, Discussion on Molecules in Interstellar Space, London, England, May 20, 21, 1981.) Royal Society (London), Philo

Astronomy and Astrophysics

Astrophysics

Interstellar Magnetic Fields, Molecular Clouds, Nebulae, Gas Density, Gravitational Collapse, Hydroxyl Radicals

Scientific paper

Magnetic fields play a major role in astrophysical phenomena occurring in the interstellar medium. The phenomena include shocks, gravitational collapse of clouds, and star formation. An investigation is conducted of the evidence concerning the strength and arrangement of magnetic fields in interstellar clouds, taking into account clouds with densities in the range from 1 to 100,000,000 per cu cm. It is concluded that molecular clouds with densities in the explored range contain magnetic fields whose strength is determined by the compression of the intrinsic interstellar field consequent upon cloud collapse. Magnetic fields in HI clouds are considered along with magnetic fields in OH maser clouds, and magnetic fields in collapsing clouds. Attention is given to the compression of gravitationally contracting clouds, magnetic field alignment on a small scale, and the large-scale alignment of cloud magnetic fields.

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